JPS61268534A - Head-up display device - Google Patents

Abstract

PURPOSE:To obtain an optimum visible field following a change in a driving position, by adjusting a reflective direction of a drive information display light according to a seat slide position. CONSTITUTION:A reflector plate 7 is provided to form an image reflected by a reflector mirror 3 at a front position of a wind shield glass in such a manner that an angle of the reflector plate 7 is adjustable. A position of driver's eyes is computed from a sensor 15 for detecting a driver's seat slide position, a sensor 16 for detecting a tilt angle of a seat back and a sensor 17 for detecting a head rest position. Driving signals are output from a controller 18 constituted of a microcomputer to a vertical direction adjusting motor 10 and a horizontal direction adjusting motor 13, so as to adjust inclination of the reflector plate 7. Thus, the angle of the reflector plate 7 is adjusted in conformity with the direction to the position of the driver's eyes when the driver sits on the seat.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a head-up display device that allows a driver to obtain an accurate viewing area even if the position of his or her eyes changes.

(Prior art) In the past, driving information such as vehicle speed, mileage, remaining fuel level, time, and various warnings was displayed using meters, clocks, or warning lamps installed on the instrument panel. It has been proposed to display this driving information in front of the windshield so that you do not have to take your eyes off the front view to view this driving information (Japanese Patent Application Laid-open No. 57-182541M).

FIG. 6 shows a schematic configuration of a conventionally known head-up display device, in which 1 is a display device such as a liquid crystal panel that displays driving information, and 2 is a display device that enlarges the driving information image displayed on the display device 1. A convex lens, 3 is a reflecting mirror, and 4 is a combiner installed on the windshield 5 that semi-transmits and semi-reflects the image reflected by the reflecting mirror 3, several meters in front of the vehicle.
A driving information display image 6 is formed at an infinite point from the point.

By the way, drivers have different body sizes and sitting heights, and their driving postures are unique, so if you roughly change the position of your seat, the position of your eyes will shift vertically or horizontally. The combiner on the windshield 5 is installed at a position that satisfies most drivers, but if the position of the driver's eyes deviates significantly for the reasons mentioned above, the combiner will deviate from the lens area and the image will be formed in front of the vehicle. There is a problem that the driving information display image that is being displayed becomes invisible.

(Object and Structure of the Invention) The present invention has been made in view of the above points, and an object of the present invention is to make it possible to obtain an appropriate field of vision even if the driving position changes, and to achieve this object. , adjusts the direction of reflection of the driving information display light in the optical path of the optical system that focuses the driving information display image displayed on the display device installed inside the vehicle on the outside front of the windshield according to the sliding position of the seat. It was configured to make it possible.

(Example) The present invention will be explained below based on the drawings.

FIG. 1 shows a schematic configuration of a head-up display device according to the present invention, in which the same reference numerals as in FIG. 1 indicate the same components.

In this embodiment, the angle of a reflecting plate 7 that forms an image reflected by a reflecting mirror 3 in front of a windshield 5 is adjustable.

FIG. 2 shows an example of the reflector 7 and its angle adjustment mechanism.
It is rotatably attached via 8b. Rotation axis 8
A is provided with a pinion 9a, and this pinion 9a meshes with a pinion 9b rotationally driven by a motor 10. When this motor 10 is rotated, the reflector 7 moves along the axis Ba,
The angle of the reflection plate 7 in the vertical direction is adjusted by rotating around Bb.

On the other hand, a gear 12a is provided on the circumference of the pedestal 11, and this gear 12a meshes with a pinion 12b to be rotated by a motor 13. When this motor 13 is rotated, the pedestal 11 is rotated, and the angle of the reflecting plate 7 in the horizontal direction is adjusted.

Figure 3 shows a block diagram of the reflection angle adjustment circuit.
The idea is to adjust the direction of the reflector depending on the position of the driver's seat and headrest.

In the figure, 15 is a sensor that detects the driver's seat sliding position, 16 is a sensor that detects the tilt angle of the driver's seat back, and 17 is a sensor that detects the position of the headrest. It is located at the location shown. 18 calculates the position of the driver's eyes from a predetermined table as shown in Table 1 below based on the outputs from the sensors 15, 16, and 17, and adjusts the vertical direction to adjust the inclination of the reflector 7. This is a microcomputer-configured controller that outputs drive signals to the horizontal adjustment motor 10 and the horizontal adjustment motor 13.

(The following is a blank space.) Next, a method of adjusting the angle of the reflector using the above table will be described.

For example, when the seat slide position sensor 15 detects the seat slide position as OOl, the seatback inclination angle sensor 16 detects the seatback inclination angle as 5°, and the headrest position sensor 17 detects the headrest position as 002, the controller 18 detects the position of the seat from the table. The angle of the reflector 7 suitable for the driver's eye position is 15° in the vertical direction.
, the horizontal direction is read out at 5°, and a drive signal corresponding to the reading is outputted to the vertical direction adjustment motor 10 and the horizontal direction adjustment motor 13. As a result, the pedestal 11 rotates by 15 degrees and the reflector plate 7 rotates by 5 degrees.

By changing the orientation of the reflector in a direction that matches the position of the driver's eyes when sitting in the seat, the driver can always see the driving information display image in front of him without shifting his viewing zone.

(Effects of the Invention) As explained above, in the present invention, the driving information display light is used in the optical path of the optical system that forms the driving information image displayed on the display device provided in the vehicle interior in front of the outside of the windshield. The direction of reflection can be adjusted according to the sliding position of the seat, so even if the position of the driver's eyes changes depending on the driver's body shape, driving posture, or seat position, an accurate field of vision can be obtained and the driver can see what's ahead. You will be able to always see the driving information display image.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of a head-up display device according to the present invention, FIG. 2 is a perspective view of a reflection angle adjustment mechanism of a head-up display device according to the present invention, and FIG. 3 is a block diagram of a reflection angle adjustment circuit. Figure 4 is a diagram showing the mounting positions of sensors that detect the position of the driver's eyes, Figure 5 is a diagram showing the positions of the seat and headrest, and Figure 6 is a schematic diagram of a conventional head-up display device. . 1... Driving information display device, 2... Concave lens, 3...
・Reflection mirror, 5... Windshield, 6... Driving information display image, 7... Reflector, 10.13... Motor, 11... Pedestal, 15, 16.17... Sensor ,1
8... Controller

Claims (3)

[Claims] (1) In a head-up display device that displays a driving information image displayed on a display device installed in a vehicle interior by focusing it on the front outside of the windshield via an optical system, at least a sheet is placed in the optical path of the optical system. 1. A head-up display device comprising a reflection angle adjustment means for adjusting the direction of reflection of driving information display light according to the slide position of the head-up display device. (2) The head-up display device according to claim 1, wherein the reflection angle adjustment means adjusts the reflection direction of the driving information display light according to the inclination angle of the seat back. (3) The head-up display device according to claim 2, wherein the reflection angle adjustment means adjusts the reflection direction of the driving information display light according to the position of the headrest.